public static void main(String[] args) {
List dataList = new ArrayList<>();
dataList.add(new Data(“Data 1”));
dataList.add(new Data(“Data 2”));
dataList.add(new Data(“Data 3”));

    // 设置加粗字体WriteCellStyle boldCellStyle = new WriteCellStyle();WriteFont boldFont = new WriteFont();boldFont.setBold(true);boldCellStyle.setWriteFont(boldFont);// 样式策略HorizontalCellStyleStrategy styleStrategy = new HorizontalCellStyleStrategy(boldCellStyle, boldCellStyle);// 写入 Excel 文件EasyExcel.write("BoldCellDemo.xlsx", Data.class).registerWriteHandler(styleStrategy).sheet("Sheet1").doWrite(dataList);
}public static class Data {@ExcelProperty("Data")private String data;public Data(String data) {this.data = data;}public String getData() {return data;}public void setData(String data) {this.data = data;}
}